import java.util.Scanner;

public class Main {
    public static void main(String[] args)
    {

        // Data and object
        double radius, length, diameter;
        Scanner scanner = new Scanner(System.in);

        // Input radius
        System.out.print("Circle radius: ");
        radius = scanner.nextFloat();

        // Calculate
        diameter = radius * 2.0;
        length = 2.0 * Math.PI * radius;

        // Result
        System.out.println("=-=-=-=-=\nCircle results:");
        System.out.printf("> radius: %.1f\n", radius);
        System.out.printf("> length: %.1f\n", length);
        System.out.printf("> diameter: %.1f\n", diameter);

    }
}
